FPGA Based Digital Control Technique for BLDC Motor Drive

This paper presents the design and implementation of digital speed controller for brushless direct current (BLDC) motor drive using Spartan 3AN field programmable gate arrays (FPGA). The FPGA drives a six pulse three-phase inverter using the digital pulse width modulation (PWM) control technique. Currently, BLDC motor is more suitable in various industrial applications because of easy electronic control mechanism and compact construction. In this paper the speed control arrangement of a BLDC motor drive is discussed using the implementation of a digital PWM technique. This control strategy is simple and strong, requires no current sensors. Owing to these abilities, this technique can be implemented on a low-cost FPGA. Simulation and experimental results have been presented to describe and verify the digital PWM technique for speed control of BLDC motor. Simulation of the proposed technique is carried out by using MATLAB/Simulink and the corresponding results are verified with experimental results of Spartan 3AN FPGA board.